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Phone Directory 312-220 Detail

State Major City Time Zone
Illinois Chicago Central

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Example: (312) 220-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
312-220 Chicago, IL Ameritech Illinois Cook Landline 02/04/1994

Other Series For Prefixes

312-2200###
312-2201###
312-2202###
312-2203###
312-2204###
312-2205###
312-2206###
312-2207###
312-2208###
312-2209###